摘要
对扁穗牛鞭草在我国的野生种分布进行深入调查表明,在四川、重庆分布有广泛的不同生态型的野生扁穗牛鞭草资源。以其中19份野生扁穗牛鞭草为供试材料,对其株高、分蘖、茎叶比、干物质重量、粗蛋白质含量等农艺性状进行初步的数量化研究表明,多数扁穗牛鞭草适合做牧草并极具培育优良新型牧草品种的潜力。经测定,大邑生态型扁穗牛鞭草和草坝生态型扁穗牛鞭草表现出植株高大、茎粗壮、叶量丰富、干物质含量高等许多牧用性饲草的优良特点,特别是草坝生态型扁穗牛鞭草的粗蛋白质含量比重高牛鞭草高约3.0%,所以,它有望成为优良的扁穗牛鞭草新品种。综合聚类显示,所有材料可分为四大类型,每个类型在饲用特性方面都有所差异,为不同目的的进一步筛选和利用及为加快我国扁穗牛鞭草种质资源的开发和利用以及改良其人工草地提供了较为科学的依据。
An investigation was carried out on the distribution of wild Hemarthria compressa in Sichuan and Chongqing etc.,which showed there existed widely different ecotypes in these areas.A quantification study was conducted on the agronomic traits of nineteen wild accessions in plant height,tiller,stem/leaf ratio,dry matter(DM) content,crude protein(CP) content etc.The result showed most of them were suitable to be used for forage with a great potential cultivated into new varieties.By experiments,H.compressa from Dayi and Caoba showed many good characters of grazing grass such as high and strong stem,rich leaf and high DM content. Particularly,the CP content of H.compressa from Caoba is 3.0% higher than that of H.compressa cv.Chonggao(control).Therefore,there is a promising for H.compressa from Caoba to offer an alternative to be a new variety.By the clustering analysis,all native accessions are classified into four different types,which is helpful to choose and utilize further.This study determines to speed up the exploitation of germplasm resources of wild Hemarthria compressa and provide a reference for its utilization further and scientific guarantee for the improvement of artificial grassland.
出处
《中国草地》
CSCD
2003年第4期15-20,共6页
Grassland of China
基金
国家自然科学基金项目(30070432)
